How to create electronic letterhead

How do I create a letterhead template?

Create a Letterhead Template in Microsoft Word
  1. Lay Out the First Page. Create a new, blank document.
  2. Lay Out the Second Page. Use the Show Next button on the Header and Footer toolbar to go to the Second Page Header.
  3. Close Up and Save. Now, just close the Header and Footer toolbar and delete the page break and the sample text you inserted.

How do I create a PDF letterhead?